I'll Do It With My Mouth...
This chapter also features a lot of sadistic stuff!!! Please read with caution!!
We left the motel, my little sister and I, and grabbed a quick lunch at a fast-food place to put something in our stomachs. She could barely walk — kept stumbling along like a newborn foal, her whole weight slumped against my shoulder. I felt a little bad, honestly.
Still, the way she kept grinning just from being glued to my side… that made me a little happy, too.
God. At this rate, I don't even know if she'll ever manage to get married properly…
"Oppa… what are we doing now??"
Yeah… she was in no shape to be wandering around outside. Just standing upright had to be wrecking her body at this point.
"…Let's just go home."
"Mmh~"
For fuck's sake, stop saying mmh…
We caught a taxi and headed straight back to the house.
By the time we got home the sun was already sinking, so I opened the fridge in the kitchen to start on dinner.
Out in the living room, my sister was sprawled across the sofa, tearing through a bag of potato chips and staring at the TV. A real spoiled brat, no other word for it. Back when we couldn't stand each other she'd order delivery every single day, and she couldn't even boil a pack of ramyeon if her life depended on it.
Dishes? That girl had never so much as pulled on a rubber glove. I really needed to start making her stand on her own two feet one of these days… not that she ever listened to a damn word I said.
I finished setting the table while those thoughts ran through my head, then called for her.
"Oppa, come here~"
What, why isn't she coming?
I walked over. She was holding both arms out toward me.
"…?? What are you doing?"
"I can't move… carry me over~♥"
My face soured on the spot.
"Oppa pounded me so damn hard… I can barely walk, you know."
Yeah… that one was on me, at least a little.
I scooped her up into my arms.
"…You're heavy."
"Hmph…! That's mean…! …Eit! Mmwah… mmph!… chu, chu…"
I hauled the lunatic across the room as she locked her arms around my neck and started planting kisses all over me, trying to get her into a chair. Our faces were so close from the kiss that I could see her eyes — and she looked like she was going into heat all over again. Whatever switch had flipped, she latched onto me like a cicada and refused to let go.
"Mmph… pwah…! We have to eat, so sit down already."
"Hehe…!! I wanna eat on top of you, Oppa~!"
She started wrestling her way up onto my thigh, and we were still going back and forth over it when—
—Bzzzt!!
My phone went off. I left her where she was and checked the screen.
Sojeong…?
Why is this girl so cute…
"Who is it…?"
From on top of my thigh, my sister called out to me in a voice gone ice-cold. Had I been smiling that obviously?
"Someone I got close with during orientation…?"
"Is it a girl…..?"
"Not telling. Heh."
"You fucking asshole…! …Aangh! …♥"
"Hey now. Watching that mouth with your oppa."
I pinched her nipple and pulled it hard. Fastest, simplest way to shut her up. I'd been using it a lot lately.
"Aahht…♥ …I told you that hurts…."
I scooped rice and side dishes onto a spoon and pushed it into her mouth.
"Just eat your food~"
"Chew, chew… Tchhhh…."
She glared up at me like an idiot, looking thoroughly unimpressed.
What do you want me to do about it… just eat already…
I kept feeding her like that, bite after bite, and before long she was parting her lips on her own with a little aah every time the spoon came near.
…Don't tell me I'm the one turning her into a spoiled brat.
I wiped the corners of her mouth with a napkin, the thought lingering.
"Mmh-mmh~! That was good, Oppaa~"
"……Can you get down now?"
"Hehe!! We look just like newlyweds like this~ Don't we…♥"
"No. We're siblings, so we can't get married. And my type is a woman who cooks for me."
"You bastard…!! Then… I'll feed you…."
"Don't want that either. Tastes better when I do the feeding."
"Grr…!! …Then how about this…?"
She pushed her chest out toward me like she was putting it on display, kneading her own breasts the way you'd milk them, her face flushed as she looked up at me.
"Wanna eat your little sister's tits…? …Hahht! ♥"
I didn't hesitate for a second. I buried my face in her chest, caught the breast she'd been groping between my teeth, and sucked down hard.
You little bitch… where the hell did you even learn to say shit like that. It's so fucking hot.
Slurp. Suck. Kiss, kiss. Schlurp.
"Haaah…!! Oppa…! …Does it taste good····? Do your little sister's… tits taste goood···?? …♥!"
They didn't taste like anything at all, but her moans made a hell of a sauce. I was more than worked up enough.
"Nngh···!! My chest got all… lewd because of you too···!! ..♥ .. And my nipples keep getting bigger because you won't stop pulling on them···! Ah! They just keep growing!!"
No milk came out of her, but I chewed and sucked at her nipples like a man dying of thirst working his way through a popsicle, hard and greedy and without a shred of mercy.
"Khhhnngh···!!! It huuurts!!! Oppa! It hurts so muuuch···!!! .. Nngh! Aah!! Fuck, that hurts so fucking bad!! Hyaah···! Jiyeon's… nipples···!! They're gonna tear riiight off!!"
She must have liked it anyway, because she wrapped her arms around my head and shoved my face even deeper into her chest…
Might as well wreck the other one to match.
"Hwaaah···!! ♥ Oppa's… eating up my… chest···!!! Feels so fucking goood···!!"
"Hoooh…! Schlurp!! Suck! Mmph… schluuurp!!"
After a while I pulled off her, satisfied, and checked my work. The skin around her nipples was swollen an angry red with my teeth marks, and the nipples themselves had puffed up a good inch and were hanging heavy.
"Hwaah··· haah··· Oppaa··· do your little sister's tits taste goood···??"
"Yeah. Fucking delicious."
I caught her by the chin, forced her mouth open, and dumped the water from the cup straight in.
"Hot, right? Drink up. …Cool and refreshing, isn't it..?"
"Kkhuurk… cough! …Cough! …Yeah, thank yooou·· Oppaaa~♥"
This psycho…
I tossed her onto the sofa, cleared the table, and did the dishes.
She was poking at her slightly stretched-out nipples with a fingertip, going ah… aah to herself, having a grand old time.
Once the sink was empty I remembered I still hadn't answered Sojeong, so I opened the chat behind my sister's back and typed a reply.
That reply came stupidly fast. Does this girl live attached to her phone…?
Oh…!! Is this what I think it is?? Is she asking me out…?
Sojeong must really like me. Well… I do have a decent face, to be fair.
???
What is this girl doing..?
Ah, this is fun. Who knew texting could be this entertaining.
"Oppa, what are you doing···?"
Jesus— she scared the hell out of me.
"Just looking at cat pictures···?"
"···Really?"
Hah… how am I getting out of this one.
My sister stared straight at me with those cold, unfocused eyes. She'd always had that look, but it still sent a genuine chill down my spine every single time I saw it.
"You already know I've always liked cats."
I like every animal there is, actually…
"···Fine. Come here, Oppa."
She led me over in front of the sofa.
"Don't sit. Just stay right there···"
"···? What are you trying to do."
"It's just··· earlier… I feel like I was the only one who came a bunch of times···"
Her face went red as she kept talking, fumbling over the words, and I still couldn't tell what she was working herself up to.
"You haven't even come yet, have you···? So···"
"Haaah··· so what, you're gonna jerk me off?"
"It's… kind of like that, but···"
"···?"
She started lying down on the sofa upside down, then opened her mouth, pointed at it with a finger, and looked up at me.
"If I do it like this… you could put it in my mouth, right···??"
Oh… that was hot, I wasn't going to lie. But it also seemed way too dangerous. Getting it into her mouth in the first place was the biggest hurdle — and even if it fit, I could see her choking, or her teeth shredding the whole head to ribbons…
"It's not gonna fit···?"
"···The entrance to my baby room was way smaller than this, and that went in just fine…"
Wait···? She's got a point. Is this actually going to go in??
"You're gonna dislocate your jaw doing this, you know that··?"
"Ah! Just do it if I tell you to!! Why does a guy have to talk so much···!!"
This psycho has completely lost it… Fine. I'll do it, goddamn it.
"Open wide… you little bitch."
"Aaangh~ Hurry up and put it iiin~ ♥"
She hooked her fingers in the corners of her own mouth and pulled it wide, taunting me. The sight of it made my cock start swelling bigger and bigger…
—Fuck it. I'm past caring.
Shove—
"Hauumph··! Mmph-mmph~! …I'sh fine~"
I let her mouth work just the tip of the head first, giving her a chance to get used to the size.
"I'm going further…"
Half the head disappeared into her mouth. It was going in more easily than I'd expected, so I pushed a little deeper—
"Kkhuuup···!! Khht! ··Pwaah!! ..Kkheegh···!"
She couldn't take it. She slapped my thigh and I pulled my hips back so she could breathe.
"Hhk··! It keeps hitting my uvula so I keep choking… But I think I've got the hang of it a little, so… let's keep going.. Oppaa···♥"
"···You want to keep going?"
She nodded. Honestly, I wasn't that into it. Just having the head nudged around in there didn't feel tight at all, and the thought of her accidentally biting down was genuinely a little terrifying.
"···This time I'll swallow it properly. A few more tries and I'll really be fine···"
"Don't push yourself too hard."
I eased it back into her mouth, slow.
—Kkheegh··· kehyaah! Khk… kkhuurk..
Oh, she was actually swallowing almost the entire head this time… but she couldn't get past the thickest ring at the base. That had to be her limit, so I started to ease my hips back—
Glk—
My sister clenched her throat and forced it down anyway, and swallowed the head all the way to the hilt.